CN115178070A - Heat-cycle self-powered desulfurization and denitration system and method - Google Patents
Heat-cycle self-powered desulfurization and denitration system and method Download PDFInfo
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- CN115178070A CN115178070A CN202210848223.8A CN202210848223A CN115178070A CN 115178070 A CN115178070 A CN 115178070A CN 202210848223 A CN202210848223 A CN 202210848223A CN 115178070 A CN115178070 A CN 115178070A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The invention relates to the field of environmental protection, and discloses a desulfurization and denitration system and a desulfurization and denitration method capable of realizing thermal cycle self-energy supply. Compare in prior art, it is long when this application is through the reaction that improves the mist, improved the denitrogenation that removes nitre effect to waste gas, spray the mode through the intermittent type formula, promoted desulfurization effect, fully improved the desulfurization to hot waste gas and removed nitre purifying effect.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a desulfurization and denitration system and a desulfurization and denitration method capable of realizing thermal cycle self-energy supply.
Background
Sulfur oxides and nitrogen oxides are the most major pollution sources of atmospheric pollution at present. Coal, as the main energy at present, is still largely used in industry and is difficult to change in a short period of time, and is largely used in the traditional industries of steel, cement, building and coal burning, and the coal can generate sulfur oxides, nitrogen oxides and other heavy metals to cause the main source of air pollution after burning. Researchers mainly pay attention to how to purify coal-fired flue gas before or during the discharge process, and remove harmful sulfur oxides, nitrogen oxides and other heavy metal elements in the coal-fired flue gas, namely, desulfurize and denitrate the coal-fired flue gas.
In the prior art, chinese patent document No. CN107875825B proposes an environmental protection apparatus for smoke dust denitration and desulfurization, which is provided with a denitriding chamber and a desulfurization chamber respectively, so that not only is the efficiency of smoke dust denitration and desulfurization improved, but also the residual water vapor in the denitriding chamber is used as the raw material of the desulfurization chamber, and the heat is recycled.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a thermal cycle self-powered desulfurization and denitration system and a method, which have the advantages of improving desulfurization and denitration effects and the like, and solve a series of problems of unsatisfactory desulfurization and denitration effects and the like in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the desulfurization and denitrification system capable of realizing thermal cycle self-energy supply comprises a denitrification chamber and a desulfurization chamber, wherein the denitrification chamber and the desulfurization chamber are used for respectively performing denitrification and desulfurization, an air pump used for adsorbing waste gas and ozone is further arranged on one side of the denitrification chamber, the output end of the air pump is sequentially communicated with the denitrification chamber and the desulfurization chamber, synchronously rotating spray pipes are further mounted in the denitrification chamber and the desulfurization chamber, a diffusion disc used for storing calcium oxide powder is further mounted in the desulfurization chamber, and the positions of the spray pipes correspond to the positions of the diffusion disc; a phase change heat storage material is arranged in the inner wall of the denitration chamber; an intermittent assembly is arranged between the air pump and the denitration chamber and used for mixing waste gas and ozone and discharging mixed reaction gas intermittently, the intermittent assembly comprises a deformable rubber air bag and an elastic assembly which is arranged on the periphery of the rubber air bag and used for promoting the rubber air bag to reset, and the same conveying pipe is communicated between the output end of the air pump and the input end of the rubber air bag;
still install on the conveyer pipe and be used for the drive the shower pivoted interlock subassembly, the interlock subassembly is including rotating to be installed a plurality of carousels inside the conveyer pipe, it is a plurality of the position of carousel with the gaseous flow direction looks adaptation in the conveyer pipe.
Furthermore, the input end of the air pump is communicated with a waste gas inlet end and an ozone inlet end which are arranged in parallel, the other end of the waste gas inlet end is communicated with an external waste gas output end, and the other end of the ozone inlet end is communicated with an external ozone output end.
Further, the both ends of rubber air bag are all fixed cover and are equipped with the hard tube, the one end of conveyer pipe is with adjacent the internal fixed intercommunication of hard tube has same conical tube, conical tube is located one end in the hard tube is the toper, another the intercommunication has the shrink pipe that is the Z style of calligraphy on the hard tube, the both ends internal diameter of shrink pipe differs, the shrink pipe with the internal diameter of the bottom that the rubber air bag is connected is greater than the shrink pipe with the top that removes the nitre room and connect, and the internal diameter follow the bottom extremely the top reduces gradually, just be equipped with the solenoid valve on the bottom that shrink pipe and rubber air bag are connected.
Further, the elastic component is including being located the rubber gasbag outside and rather than two arc dishes of laminating mutually, the U-shaped platform is still installed to the periphery of rubber gasbag, the U-shaped bench relative both sides all slide the cover and be equipped with a plurality of horizontal guide arms of highly uniform, two fixed connection is a plurality of in the corresponding side respectively for the arc dish one end of horizontal guide arm, wherein two still all overlap on the horizontal guide arm and be equipped with reset spring, reset spring's both ends respectively the butt be in the lateral wall of U-shaped platform with correspond the side on the arc dish.
Further, a denitration ring pipe is fixedly installed on the inner wall of the denitration chamber, and the top end of the contraction pipe connected with the denitration chamber penetrates through the denitration chamber and is communicated with the denitration ring pipe;
a desulfurization ring pipe is fixedly arranged on the inner wall of the desulfurization chamber, the bottom end of the denitration chamber is communicated with a gas communicating pipe, and the other end of the gas communicating pipe penetrates through the desulfurization chamber and is communicated with the desulfurization ring pipe;
the denitration ring pipe and the desulfuration ring pipe are provided with a plurality of evenly distributed air injection holes on the side walls, the inner wall of the desulfuration chamber is further fixedly sleeved with a supporting plate, the supporting plate is fixedly connected with a tray coaxial with the supporting plate, the diffusion plate is arranged at the top of the tray, a plurality of evenly distributed diffusion holes are formed in the outer wall of the diffusion plate, and the plurality of air injection holes in the desulfuration chamber are consistent with the plurality of diffusion holes in height.
Furthermore, arc-shaped rings respectively positioned on the denitration ring pipe and the desulfurization ring pipe are sleeved on the inner walls of the denitration chamber and the desulfurization chamber, and the inner diameter of each arc-shaped ring is larger than that of the denitration ring pipe and that of the desulfurization ring pipe.
Furthermore, the tray is round platform form, just set up a plurality of width on the outer wall of tray and differ and spray the groove, it is a plurality of spray the groove the position with the indoor a plurality of desulfurization highly the looks adaptation of diffusion hole.
Further, remove the nitre room with the top of desulfurization room all rotates the cover and is equipped with two identical rotating-tube of height, two in the middle part the intercommunication has same liquid communicating pipe on the rotating-tube, is located respectively remove the nitre room with two in the desulfurization room the both ends of shower respectively with correspond the one end of rotating-tube is linked together, just the desulfurization room upper end the other end and the outside water supply end of rotating-tube are linked together, remove nitre room upper end the one end of rotating-tube is the enclosed state, and two the shower is equipped with a plurality of even orifices of distribution along all vertically downwards on its axial straight line.
Furthermore, a rotating shaft is rotatably mounted on the conveying pipe, the bottom end of the rotating shaft extends into the conveying pipe, a plurality of rotating discs are fixedly connected to the bottom end of the rotating shaft, a fixed seat and an extension seat are fixedly mounted on the U-shaped table, the top end of the rotating shaft penetrates through the extension seat, a driving rod is rotatably mounted on the fixed seat, and a bevel gear which is meshed with one end of the driving rod and one end of the rotating shaft are fixedly mounted on the fixed seat;
the fixing base with it installs same speed reduction axle to rotate on the outer wall of nitre removing room, the one end of speed reduction axle with the equal fixed mounting of the other end of actuating lever has first belt pulley that the external diameter differs, the other end of speed reduction axle with the equal fixed mounting of the one end of the closed condition of rotating tube has the second belt pulley that the external diameter differs, two the tensioning has a common first driving belt on the first belt pulley, two the tensioning has a common second driving belt on the second belt pulley.
The invention also provides a desulfurization and denitrification method capable of realizing thermal cycle self-energy supply, which applies the desulfurization and denitrification system capable of realizing thermal cycle self-energy supply, and comprises the following steps:
s1, removing nitrate: the method comprises the following steps that a mixed gas of ozone and waste gas is sucked together by using the air pump (1) and is conveyed into the rubber air bag (6) through the conveying pipe (4), the mixed gas entering the rubber air bag (6) is stored in the rubber air bag along with the intermittent expansion and contraction of the rubber air bag (6) and fully reacts, the reacted mixed gas is conveyed into the denitration chamber (9), when the mixed gas is conveyed through the conveying pipe (4), the gas flows and drives the plurality of rotary discs (27) to synchronously rotate, and then the two spraying pipes (19) are driven to synchronously rotate to spray in the denitration chamber (9) and the desulfuration chamber (12), the mixed gas reacts in the denitration chamber (9) to generate nitric acid, N elements in the waste gas are removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas reacted in the step S1 into a desulfurization chamber (12), releasing calcium oxide from a diffusion disc (22), reacting the mixed gas released in the step S1 in the denitration chamber (12), and converting S element in the waste gas into CaSO under the action of calcium hydroxide generated by the calcium oxide and water sprayed by a Sooka spraying pipe (19) 4 Precipitating to realize desulfurization, wherein the heat released in the reaction process is stored by the phase-change heat storage material in the denitration chamber (12) and is used for releasing the stored heat to maintain the temperature condition required by the reaction in the denitration chamber (12) when the ambient temperature is lower than the reaction condition temperature in the denitration chamber (12);
s3, dust removal: and (3) introducing the mixed gas subjected to desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and finish desulfurization, denitration and purification operations of waste gas.
(III) advantageous effects
Compared with the prior art, the invention provides a desulfurization and denitration system and method capable of realizing thermal cycle self-energy supply, and the system and method have the following beneficial effects:
1. the system and the method for desulfurizing and denitrating with thermal cycle self-powered convey the mixed gas of ozone and waste gas into the rubber air bag through the air pump, and cooperate with the electromagnetic valve to open and close, under the elastic action of the rubber air bag and the reset spring, N generated in the rubber air bag 2 O 5 Gas and other gases enter the denitration chamber intermittently, the reaction time of the mixed gas is prolonged, the concentration of the generated gas is improved, the reaction rate of the mixed gas in the conveying process can be promoted due to the gradual reduction of the inner diameter of the shrinkage pipe, and compared with the prior art, the N is fully improved 2 O 5 The concentration of the gas entering the denitration chamber indirectly improves the denitration effect on the waste gas.
2. The system and the method for desulfurizing and denitrating can realize the self-powered heat circulation, and synchronously rotate a plurality of rotary discs through the flowing of waste gas and the driving of the rotary discsThe two spraying pipes are driven to rotate synchronously and indirectly, so that the inside of the denitration chamber and the inside of the desulfurization chamber are sprayed in a rotating manner, the denitration reaction and the desulfurization reaction are promoted while the utilization rate of waste gas is improved, the generated calcium sulfate precipitate can be flushed away in time, the calcium hydroxide is ensured to be in full contact with sulfur dioxide gas, the desulfurization rate is improved, and efficient desulfurization and denitration are realized; in the process of generating calcium hydroxide in the denitration chamber, the calcium oxide releases heat when meeting water, and the calcium hydroxide reacts with sulfur dioxide and oxygen to generate CaSO 4 +H 2 O is also an exothermic reaction, so the redundant heat can be stored by the phase change heat storage material in the inner wall of the denitration chamber, and when the outdoor temperature is lower than the temperature in the desulfurization chamber, the sulfur dioxide is fixed to generate CaSO 4 When the appropriate temperature required by the reaction is reached, the phase-change heat storage material releases heat to maintain the temperature of the reaction condition required by the denitration chamber, so that the chemical heat generated by the reaction in the denitration chamber can be stored, and the thermal cycle is used for maintaining the temperature of the reaction condition required by the denitration reaction in the denitration chamber.
3. This but desulfurization of thermal cycle self-power supply removes nitre system and method, through the tray that sets up the round platform form, make the calcium hydroxide solution that the reaction generated easily flow on the round platform surface, and simultaneously, set up a plurality of spray tanks, calcium hydroxide solution and sulfur dioxide gas's area of contact has been enlarged, realize abundant desulfurization reaction, further improve desulfurization effect, in addition, through setting up the arc circle, avoid causing palirrhea in the water source entering that sprays out through the shower removes nitre ring canal and the desulfurization ring canal.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the present invention in a partially cut-away perspective configuration;
FIG. 3 is a schematic perspective view of a portion of the present invention;
FIG. 4 is a schematic sectional view of the delivery tube of the present invention;
FIG. 5 is a schematic perspective view of the rubber bladder of the present invention;
FIG. 6 is another perspective view of the rubber air bag of the present invention;
FIG. 7 is a schematic view of a cut-away perspective structure of a denitration chamber according to the present invention;
FIG. 8 is a schematic sectional view of a desulfurization chamber according to the present invention;
FIG. 9 is a schematic view of the desulfurization chamber of the present invention in another perspective view.
In the figure: 1. an air pump; 2. an exhaust gas inlet end; 3. an ozone inlet end; 4. a delivery pipe; 5. a tapered tube; 6. a rubber air bag; 7. a rigid tube; 8. shrinking the tube; 9. a denitration chamber; 10. a denitration ring pipe; 11. a gas communicating pipe; 12. a desulfurization chamber; 13. a desulfurization ring pipe; 14. a gas injection hole; 15. a U-shaped table; 16. a horizontal guide rod; 17. an arc-shaped disc; 18. a return spring; 19. a shower pipe; 20. spraying a hole; 21. a liquid communicating pipe; 22. a diffusion disk; 23. a diffusion hole; 24. an arc-shaped ring; 25. a fixed seat; 26. a rotating shaft; 27. a turntable; 28. a bevel gear; 29. an extension base; 30. a first pulley; 31. a reduction shaft; 32. a second pulley; 33. an electromagnetic valve; 34. and (4) supporting the disc.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background of the invention, the prior art has shortcomings, and in order to solve the technical problems, the application provides a thermal cycle self-powered desulfurization and denitration system and method.
In a typical embodiment of the present application, as shown in fig. 1 to 9, a desulfurization and denitrification system capable of thermal cycle self-powered comprises a denitrification chamber 9 and a desulfurization chamber 12 for denitrification and desulfurization respectively, an air pump 1 for adsorbing exhaust gas and ozone is further disposed on one side of the denitrification chamber 9, an output end of the air pump 1 is sequentially communicated with the denitrification chamber 9 and the desulfurization chamber 12, and a phase change heat storage material is disposed in an inner wall of the denitrification chamber 12; the denitration chamber 9 and the desulfuration chamber 12 are both provided with a spray pipe 19 which rotates synchronously, and the desulfuration chamberStill install the diffusion dish 22 that is used for saving calcium oxide powder in 12, the position of shower 19 is corresponding with the position of diffusion dish 22, air pump 1 and remove and still be equipped with intermittent type subassembly between the nitre room 9, intermittent type subassembly is used for mixing waste gas and ozone and the reaction gas after the intermittent type formula is discharged and is mixed, intermittent type subassembly is including the rubber gasbag 6 that can take place deformation, and install the elastic component who promotes rubber gasbag 6 and reset at rubber gasbag 6 periphery, and the intercommunication has same conveyer pipe 4 between the output of air pump 1 and the input of rubber gasbag 6, still install the interlock subassembly that is used for driving shower 19 pivoted on conveyer pipe 4, the interlock subassembly is including rotating a plurality of carousels 27 of installing inside conveyer pipe 4, the position of a plurality of carousels 27 and the interior gaseous flow direction looks adaptation of conveyer pipe 4, when adopting this system and method to purify waste gas, what involve removes nitre, the chemical reaction of devulcanization is: o is 3 +NO→NO 2 +O 2 、O 3 +NO 2 →NO 3 +O 2 、NO 2 +NO 3 →N 2 O 5 、N 2 O 5 +H 2 O→HNO 3 ；CaO+H 2 O→Ca(OH) 2 、Ca(OH) 2 +SO 2 +O 2 →CaSO 4 +H 2 O, the detailed reaction introduction is described in chinese patent publication No. CN107875825B, which is not described herein, and when the system is operated, ozone and exhaust gas are sucked together by the air pump 1 and are transported into the rubber air bag 6 through the transport pipe 4, and along with the intermittent expansion and contraction of the rubber air bag 6, the system is operated in cooperation with the valve on the other side of the rubber air bag 6, so that the mixed gas is stored in the rubber air bag 6 for a period of time, and after the sufficient reaction, the reacted mixed gas is transported into the denitration chamber 9, so that the N entering the denitration chamber 9 can be increased 2 O 5 Gas concentration, and the cooperation removes spraying effect of shower 19 in nitre room 9, the abundant reaction generates nitric acid, realize highly getting rid of N element, and simultaneously, when gaseous through conveyer pipe 4 is carried, can also drive carousel 27, drive two shower 19 through the interlock subassembly and continuously rotate in step, the improvement is to removing the spraying effect in nitre room 9 and the desulfurization room 12, under the impetus of waste gas, can rotate the mixing degree that improves the mist through a plurality of carousels 27, improve ozoneThe reaction rate with N element in the waste gas, and the calcium oxide powder in the desulfurization chamber 12 can be sprayed and matched with the moisture contained in the gas to promote the reaction to generate calcium hydroxide, in the process of generating the calcium hydroxide, the calcium oxide releases heat when meeting water, and the calcium hydroxide reacts with sulfur dioxide and oxygen to generate CaSO 4 +H 2 O is also an exothermic reaction, so the redundant heat can be stored by the phase change heat storage material in the inner wall of the denitration chamber 12, and CaSO is generated when the outdoor temperature is lower than the temperature in the desulfurization chamber for fixing sulfur dioxide 4 When the proper temperature is needed by the reaction, the phase-change heat storage material releases heat to maintain the temperature of the reaction condition needed by the desulfurization chamber, so that the chemical heat generated by the reaction in the denitration chamber can be stored, and then the thermal cycle is carried out to maintain the temperature of the reaction condition needed by the denitration reaction in the denitration chamber; the spraying of shower 19 in denitration chamber 12 can carry out washing when intermittent type to the calcium sulfate that the reaction produced, avoids covering the calcium sulfate on surface to influence the contact reaction of calcium hydrate and sulfur dioxide gas to can utilize waste gas to be driven by the kinetic energy of combustion gas to drive carousel 27 when fully having improved the desulfurization of waste gas except that nitre purification efficiency, carry out the self-energy.
The working principle of the phase change heat storage material is that when the reaction is carried out in the denitration chamber to generate excessive heat, the heat is absorbed, when the phase change point is reached, the heat is melted and absorbed and stored, when the external temperature is lower, the phase change material is cooled, and the stored latent heat is emitted into the denitration chamber 12 to keep the temperature required by the proper denitration reaction in the denitration chamber 2 SO 4 ·10H 2 O、FeBr 2 ·6H 2 O, liNO with the mass fraction of 50-65% 3 ·3H 2 0 compounding 35-45% of Ni (NO) 3 ) 2 60 to 70 mass percent of CaCl 2 ·6H 2 MgCl with O compounding content of 30-40 wt% 2 ·6H 2 O、Mn(NO 3 ) 2 6H 2 O and the like.
As a preferable mode in the embodiment, the input end of the air pump 1 is communicated with the parallel exhaust gas inlet end2 and an ozone inlet end 3, the other end of the waste gas inlet end 2 is communicated with an external waste gas output end, the other end of the ozone inlet end 3 is communicated with the external ozone output end, both ends of a rubber air bag 6 are fixedly sleeved with hard tubes 7, one end of a conveying pipe 4 is fixedly communicated with the inside of the adjacent hard tube 7 by a same conical tube 5, one end of the conical tube 5 positioned in the hard tube 7 is conical, the other hard tube 7 is communicated with a contraction tube 8, the inner diameters of both ends of the contraction tube 8 are different, an electromagnetic valve 33 is arranged on the contraction tube 8, an elastic component comprises two arc-shaped discs 17 positioned outside the rubber air bag 6 and attached with the rubber air bag, a U-shaped table 15 is also arranged on the periphery of the rubber air bag 6, a plurality of horizontal guide rods 16 with the same height are respectively sleeved on both opposite sides of the U-shaped table 15 in a sliding manner, and the two arc-shaped discs 17 are respectively fixedly connected with one end of the plurality of horizontal guide rods 16 on the corresponding sides, wherein, two horizontal guide rods 16 are also sleeved with a return spring 18, two ends of the return spring 18 are respectively abutted against the side wall of the U-shaped platform 15 and the arc-shaped disc 17 on the corresponding side, when purifying waste gas, the air pump 1 operates, the waste gas and ozone gas are mixed and adsorbed into the air pump 1 through the waste gas inlet end 2 and the ozone inlet end 3 and are conveyed into the rubber air bag 6 through the conveying pipe 4, at the moment, the electromagnetic valve 33 is closed, so that the mixed gas continuously enters the rubber air bag 6 and promotes the rubber air bag 6 to continuously expand, meanwhile, under the guiding action of the horizontal guide rods 16 on two sides, the arc-shaped discs 17 on two sides are mutually far away, the return spring 18 is in a compression state, after the mixed gas in the rubber air bag 6 reacts for a period of time, the electromagnetic valve 33 is opened, under the elastic contraction action of the rubber air bag 6 and the return spring 18, so that the N2O5 gas and other gases generated in the rubber air bag 6 enter the denitration chamber 9 along the pipe 8, because the inner diameter of the shrinkage pipe 8 is gradually reduced, the reaction rate of the mixed gas in the conveying process can be promoted, and compared with the prior art, the N is increased 2 O 5 The concentration of the gas entering the denitration chamber 9 indirectly improves the denitration effect on the waste gas.
As a preferred embodiment in this embodiment, a denitration loop 10 is fixedly installed on the inner wall of the denitration chamber 9, the top end of the contraction tube 8 penetrates through the denitration chamber 9 and is communicated with the denitration loop 10, a desulfuration loop 13 is fixedly installed on the inner wall of the desulfuration chamber 12, and the denitration chamber 9The bottom end is communicated with a gas communicating pipe 11, the other end of the gas communicating pipe 11 penetrates through a desulfurization chamber 12 and is communicated with a desulfurization ring pipe 13, a plurality of evenly distributed gas injection holes 14 are respectively arranged on the side walls of a denitration ring pipe 10 and the desulfurization ring pipe 13, a supporting plate 34 is fixedly sleeved on the inner wall of the desulfurization chamber 12, a tray coaxial with the supporting plate 34 is fixedly connected on the supporting plate 34, a diffusion plate 22 is arranged at the top of the tray, a plurality of evenly distributed diffusion holes 23 are arranged on the outer wall of the diffusion plate 22, the heights of the plurality of gas injection holes 14 and the plurality of diffusion holes 23 in the desulfurization chamber 12 are consistent, two rotating pipes with the same height are respectively sleeved on the top ends of the denitration chamber 9 and the desulfurization chamber 12 in a rotating manner, the same liquid communicating pipe 21 is communicated on the two rotating pipes in the middle, the two ends of the two spray pipes 19 are respectively communicated with one end of the corresponding rotating pipes, and the other end of the rotating pipe at the upper end of the desulfurization chamber 12 is communicated with an external water supply end, one end of a rotating pipe at the upper end part of the saltpeter removing chamber 9 is in a closed state, a plurality of spray holes 20 which are uniformly distributed are formed in each of the two spray pipes 19, a rotating shaft 26 is rotatably installed on each of the conveying pipes 4, the bottom end of each rotating shaft 26 extends into each conveying pipe 4, a plurality of rotating discs 27 are fixedly connected to the bottom end of each rotating shaft 26, a fixing seat 25 and an extension seat 29 are fixedly installed on each U-shaped table 15, the top end of each rotating shaft 26 penetrates through each extension seat 29, a driving rod is rotatably installed on each fixing seat 25, meshed bevel gears 28 are fixedly installed at one end of each driving rod and one end of each rotating shaft 26, the same decelerating shaft 31 is rotatably installed on the outer walls of the fixing seats 25 and the saltpeter removing chamber 9, first belt pulleys 30 with different outer diameters are fixedly installed at one end of each decelerating shaft 31 and the other end of each driving rod, second belt pulleys 32 with different outer diameters are fixedly installed at the other ends of the decelerating shafts 31 and the rotating pipes, two first belt pulleys 30 are tensioned with a common first transmission belt, two second belt pulleys 32 are tensioned with a common second transmission belt, referring to fig. 2, 8 and 9, when purifying waste gas, a water source is input into two spray pipes 19 through a rotating pipe at the rightmost end, and is sprayed out in a mist form through a plurality of spray holes 20 at corresponding positions, and enters into a denitration chamber 9 through a denitration ring pipe 10 and the spray holes 14 thereon 2 O 5 The gas reacts with water to generate nitric acid to realize denitrification and denitration, and other mixed gases pass through the gas communicating pipe11 to a desulfurization chamber 12, and then to see the desulfurization chamber 12, calcium oxide in the diffusion disc 22 reacts with water to generate calcium hydroxide, a desulfurization ring pipe 13 at a corresponding position and a plurality of gas injection holes 14 thereon spray mixed gas containing sulfur dioxide gas, the calcium hydroxide contacts and reacts with the calcium hydroxide to generate calcium sulfate, which is insoluble in water, so as to realize desulfurization, and meanwhile, when the gas is continuously conveyed through a conveying pipe 4, the gas flows and drives a plurality of rotating discs 27 to synchronously rotate, so that a rotating shaft 26 rotates, under the interlocking action of a bevel gear 28 and a first belt pulley 30, a decelerating shaft 31 rotates, so that under the action of a transmission belt, a second belt pulley 32 drives two spraying pipes 19 to synchronously rotate, so as to rotatably spray the inside of the denitrification chamber 9 and the desulfurization chamber 12, further, power self-energy supply when waste gas is expelled is used, the utilization rate of the waste gas is improved, denitrification reaction and desulfurization reaction are promoted, generated calcium sulfate precipitate can be timely flushed away, sufficient contact between the calcium hydroxide and the sulfur dioxide gas is ensured, the desulfurization rate is improved, and efficient desulfurization is realized.
As an optimal implementation manner in this embodiment, it is equipped with arc ring 24 that is located on denitration ring pipe 10 and desulfurization ring pipe 13 respectively to all overlap on the inner wall of denitration chamber 9 and desulfurization chamber 12, the internal diameter of arc ring 24 is greater than the internal diameter of denitration ring pipe 10 and desulfurization ring pipe 13, the tray is round platform form, and set up a plurality of spray tanks that the width differs on the outer wall of tray, the position of a plurality of spray tanks and the high looks adaptation of a plurality of diffusion holes 23 in desulfurization chamber 12, through setting up the tray of round platform form, make the calcium hydroxide solution that the reaction generated easily flow on the round platform surface, and simultaneously, set up a plurality of spray tanks, the area of contact of calcium hydroxide solution and sulfur dioxide gas has been enlarged, realize abundant desulfurization reaction, further improve desulfurization effect, in addition, through setting up arc ring 24, avoid causing the palirrhea in water source that sprays out through spray pipe 19 gets into denitration ring pipe 10 and desulfurization ring pipe 13.
The invention also provides a desulfurization and denitration method capable of realizing thermal cycle self-energy supply, which is particularly applied to the desulfurization and denitration system capable of realizing thermal cycle self-energy supply and comprises the following steps:
s1, removing nitrate: the method comprises the following steps that a gas pump 1 is used for sucking mixed gas of ozone and waste gas together, the mixed gas is conveyed into a rubber air bag 6 through a conveying pipe 4, the mixed gas entering the rubber air bag 6 is stored in the rubber air bag 6 along with intermittent expansion and contraction of the rubber air bag 6 and is subjected to full reaction, the reacted mixed gas is conveyed into a denitration chamber 9, when the mixed gas is conveyed through the conveying pipe 4, the gas flows and drives a plurality of turntables 27 to synchronously rotate, two spraying pipes 19 are further driven to synchronously rotate to be sprayed in the denitration chamber 9 and a desulfuration chamber 12, the mixed gas reacts in the denitration chamber 9 to generate nitric acid, N elements in the waste gas are removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas reacted in the step S1 into the desulfurization chamber 12, releasing calcium oxide from the diffusion disc 22, reacting the mixed gas released in the step S1 in the denitration chamber 12, and converting the S element in the waste gas into CaSO under the action of calcium hydroxide generated by the calcium oxide and the water sprayed by the spray pipe 19 4 Precipitating to realize desulfurization, wherein the heat released in the reaction process is stored by the phase-change heat storage material in the denitration chamber 12 and used for releasing the stored heat to maintain the temperature condition required by the reaction in the denitration chamber 12 when the ambient temperature is lower than the reaction condition temperature in the denitration chamber 12;
s3, dust removal: and (3) introducing the mixed gas subjected to desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and finish desulfurization, denitration and purification operations of waste gas.
The working principle of the invention is as follows: when purifying waste gas, air pump 1 operation, mix through waste gas inlet end 2 and ozone inlet end 3 and adsorb to air pump 1 with waste gas and ozone gas in, and carry to rubber gasbag 6 in through conveyer pipe 4, solenoid valve 33 closes this moment, make the mist continuously get into in the rubber gasbag 6, and make rubber gasbag 6 continuously expand, and simultaneously, under the guide effect of horizontal guide arm 16 of both sides, make the arc dish 17 of both sides keep away from each other, reset spring 18 is in compression state, the mist in the rubber gasbag 6 reacts after a period, solenoid valve 33 opens, under the elastic action of rubber gasbag 6 and reset spring 18, make the N that generates in the rubber gasbag 6 2 O 5 The gas and other gases enter the denitration chamber 9 along the shrinkage pipe 8 together, and the mixed gas can be promoted to be conveyed due to the gradual reduction of the inner diameter of the shrinkage pipe 8The reaction rate in the process is increased by N compared with the prior art 2 O 5 The concentration of the gas entering the denitration chamber 9 indirectly improves the denitration effect on the waste gas.
When purifying waste gas, water source is input into the two spray pipes 19 through the end parts of the rotating pipes, and is sprayed out in a fog shape through the plurality of spray holes 20 on the corresponding positions, and enters the N in the denitration chamber 9 through the denitration ring pipe 10 and the spray holes 14 on the denitration ring pipe 2 O 5 The gas reacts with water to generate nitric acid, nitrogen removal and denitration are realized, other mixed gas is conveyed into a desulfurization chamber 12 through a gas communicating pipe 11, the inside of the desulfurization chamber 12 is seen, calcium oxide in a diffusion disc 22 reacts with the water to generate calcium hydroxide, the desulfurization ring pipe 13 and the mixed gas containing sulfur dioxide gas are ejected out of a plurality of gas ejecting holes 14 at the corresponding position, the mixed gas contacts with the calcium hydroxide and reacts to generate calcium sulfate which is insoluble in water, desulfurization is realized, meanwhile, when the gas is continuously conveyed through a conveying pipe 4, the gas flows and drives a plurality of rotating discs 27 to synchronously rotate, so that a rotating shaft 26 rotates, under the linkage action of a bevel gear 28 and a first belt pulley 30, a decelerating shaft 31 rotates, so that under the action of a transmission belt, a second belt pulley 32 drives two spraying pipes 19 to synchronously rotate, the denitration chamber 9 and the inside of the desulfurization chamber 12 are sprayed in a rotating manner, the utilization rate of waste gas is improved, the denitration reaction and the desulfurization reaction are promoted, the generated calcium sulfate precipitate can be timely flushed away, the sufficient contact between the calcium hydroxide and the sulfur dioxide gas is ensured, the desulfurization rate is improved, and the high-efficiency of desulfurization and denitration is realized.
Through setting up the tray of round platform form for the calcium hydroxide solution that the reaction generated easily flows on the round platform surface, and simultaneously, set up a plurality of spray tanks, enlarged calcium hydroxide solution and sulfur dioxide gas's area of contact, realize abundant desulfurization reaction, further improve desulfurization effect, in addition, through setting up arc circle 24, avoid causing the palirrhea in the water source entering denitration ring canal 10 that sprays out through shower 19 and the desulfurization ring canal 13.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. But desulfurization of thermal cycle self-power supply removes nitre system, including being used for removing nitre desulfurization remove nitre room (9) and desulfurization room (12) respectively, its characterized in that, one side of removing nitre room (9) still is equipped with air pump (1) that is used for adsorbing waste gas and ozone, the output of air pump (1) in proper order with remove nitre room (9) and desulfurization room (12) are linked together, remove nitre room (9) with still all install synchronous pivoted shower (19) in the desulfurization room (12), and still install diffusion dish (22) that are used for saving calcium oxide powder in the desulfurization room (12), the position of shower (19) with the position of diffusion dish (22) corresponds; a phase change heat storage material is arranged in the inner wall of the denitration chamber (12);
an intermittent assembly is further arranged between the air pump (1) and the saltpeter removing chamber (9), the intermittent assembly is used for mixing waste gas and ozone and discharging mixed reaction gas intermittently, the intermittent assembly comprises a deformable rubber air bag (6) and an elastic assembly which is arranged on the periphery of the rubber air bag (6) and promotes the rubber air bag (6) to reset, and the same conveying pipe (4) is communicated between the output end of the air pump (1) and the input end of the rubber air bag (6);
still install on conveyer pipe (4) and be used for the drive shower (19) pivoted interlock subassembly, the interlock subassembly is including rotating to be installed a plurality of carousel (27) of conveyer pipe (4) inside, it is a plurality of the position of carousel (27) with the flow direction looks adaptation of gas in conveyer pipe (4).
2. The system for desulfurization and denitration by self-powered thermal cycle according to claim 1, wherein the input end of the air pump (1) is communicated with a waste gas inlet end (2) and an ozone inlet end (3) which are arranged in parallel, the other end of the waste gas inlet end (2) is communicated with an external waste gas output end, and the other end of the ozone inlet end (3) is communicated with an external ozone output end.
3. The system for removing sulfur and nitrate by self-powered thermal cycle as claimed in claim 1, wherein both ends of the rubber air bag (6) are fixedly sleeved with hard tubes (7), one end of the conveying pipe (4) is fixedly communicated with the adjacent hard tube (7) by a same tapered tube (5), one end of the tapered tube (5) positioned in the hard tube (7) is tapered, the other hard tube (7) is communicated with a Z-shaped shrinkage tube (8), the inner diameters of both ends of the shrinkage tube (8) are different, the inner diameter of the bottom end of the shrinkage tube (8) connected with the rubber air bag (6) is larger than the inner diameter of the top end of the shrinkage tube (8) connected with the nitrate removing chamber (9), the inner diameter is gradually reduced from the bottom end to the top end, and the bottom end of the shrinkage tube (8) connected with the rubber air bag (6) is provided with an electromagnetic valve (33).
4. The desulfurization and denitration system capable of realizing the thermal cycle self-energy supply according to claim 3, wherein the elastic component comprises two arc-shaped discs (17) which are positioned at the outer side of the rubber air bag (6) and are attached to the rubber air bag, a U-shaped table (15) is further installed at the periphery of the rubber air bag (6), a plurality of horizontal guide rods (16) with the same height are respectively slidably sleeved on two opposite sides of the U-shaped table (15), the two arc-shaped discs (17) are respectively and fixedly connected with one ends of the horizontal guide rods (16) on the corresponding sides, a return spring (18) is further respectively sleeved on the two horizontal guide rods (16), and two ends of the return spring (18) are respectively abutted to the side wall of the U-shaped table (15) and the arc-shaped discs (17) on the corresponding sides.
5. The system for removing sulfur and nitrate by self-powered by thermal cycle as claimed in claim 3, characterized in that a nitrate removing loop (10) is fixedly arranged on the inner wall of the nitrate removing chamber (9), and the top end of the contraction tube (8) connected with the nitrate removing chamber (9) penetrates through the nitrate removing chamber (9) and is communicated with the nitrate removing loop (10);
a desulfurization ring pipe (13) is fixedly arranged on the inner wall of the desulfurization chamber (12), the bottom end of the denitration chamber (9) is communicated with a gas communicating pipe (11), and the other end of the gas communicating pipe (11) penetrates through the desulfurization chamber (12) and is communicated with the desulfurization ring pipe (13);
the denitration ring pipe (10) with all seted up a plurality of gas orifices (14) that distribute evenly on the lateral wall of desulfurization ring pipe (13), just it is equipped with supporting disk (34) still to fix the cover on the inner wall of desulfurization chamber (12), fixedly connected with is rather than coaxial tray on supporting disk (34), install diffusion dish (22) the top of tray, set up a plurality of diffusion holes (23) that distribute evenly on the outer wall of diffusion dish (22), just it is a plurality of in desulfurization chamber (12) gas orifices (14) with a plurality of the highly uniform of diffusion hole (23).
6. The system for desulfurization and denitration with self-powered thermal cycle according to claim 5, wherein the inner walls of the denitration chamber (9) and the desulfurization chamber (12) are also sleeved with arc-shaped rings (24) respectively positioned on the denitration loop (10) and the desulfurization loop (13), and the inner diameter of the arc-shaped rings (24) is larger than the inner diameters of the denitration loop (10) and the desulfurization loop (13).
7. The system of claim 5, wherein the tray is in the shape of a circular truncated cone, the outer wall of the tray is provided with a plurality of spraying grooves with different widths, and the positions of the spraying grooves are matched with the heights of the diffusion holes (23) in the desulfurization chamber (12).
8. The system for removing sulfur and nitrate by self-powered thermal cycle according to claim 7, wherein the top ends of the nitrate removing chamber (9) and the desulfurization chamber (12) are rotatably sleeved with two rotating pipes with the same height, the middle parts of the two rotating pipes are communicated with the same liquid communicating pipe (21), two ends of the two spray pipes (19) respectively positioned in the nitrate removing chamber (9) and the desulfurization chamber (12) are respectively communicated with one end of the corresponding rotating pipe, the other end of the rotating pipe at the upper end of the desulfurization chamber (12) is communicated with an external water supply end, one end of the rotating pipe at the upper end of the nitrate removing chamber (9) is in a closed state, and the two spray pipes (19) are vertically downwards provided with a plurality of uniformly distributed spray holes (20) along the axial straight line thereof.
9. The system for desulfurizing and denitrating the gas in the flue gas of claim 4, wherein a rotating shaft (26) is rotatably mounted on the conveying pipe (4), the bottom end of the rotating shaft (26) extends into the conveying pipe (4), a plurality of rotating discs (27) are fixedly connected to the bottom end of the rotating shaft (26), a fixed seat (25) and an extension seat (29) are fixedly mounted on the U-shaped table (15), the top end of the rotating shaft (26) penetrates through the extension seat (29), a driving rod is rotatably mounted on the fixed seat (25), and a bevel gear (28) meshed with the fixed seat and the rotating shaft (26) is fixedly mounted at one end of the driving rod;
fixing base (25) with rotate on the outer wall of removing nitre room (9) and install same speed reduction axle (31), the one end of speed reduction axle (31) with the equal fixed mounting of the other end of actuating lever has first belt pulley (30) that the external diameter differs, the other end of speed reduction axle (31) with the equal fixed mounting of one end of the confined state of rotating-tube has second belt pulley (32) that the external diameter differs, two the tensioning has a common first drive belt on first belt pulley (30), two the tensioning has a common second drive belt on second belt pulley (32).
10. A method for thermally-cycled self-powered desulfurization and denitrification using the thermally-cycled self-powered desulfurization and denitrification system as claimed in any one of claims 1 to 9, comprising the steps of:
s1, removing nitrate: the method comprises the following steps that a mixed gas of ozone and waste gas is sucked together by using the air pump (1) and is conveyed into the rubber air bag (6) through the conveying pipe (4), the mixed gas entering the rubber air bag (6) is stored in the rubber air bag along with the intermittent expansion and contraction of the rubber air bag (6) and fully reacts, the reacted mixed gas is conveyed into the denitration chamber (9), when the mixed gas is conveyed through the conveying pipe (4), the gas flows and drives the plurality of rotary discs (27) to synchronously rotate, and then the two spraying pipes (19) are driven to synchronously rotate to spray in the denitration chamber (9) and the desulfuration chamber (12), the mixed gas reacts in the denitration chamber (9) to generate nitric acid, N elements in the waste gas are removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas reacted in the step S1 into a desulfurization chamber (12), releasing calcium oxide in the diffusion disc (22), reacting the mixed gas released in the denitration chamber (12) and reacted in the step S1, and converting the S element in the waste gas into CaSO (calcium oxide) by the action of calcium hydroxide generated by the calcium oxide and the water sprayed out by the spraying pipe (19) 4 Precipitating to realize desulfurization, wherein the heat released in the reaction process is stored by the phase change heat storage material in the denitration chamber (12) and is used for releasing the stored heat to maintain the temperature condition required by the reaction in the denitration chamber (12) when the ambient temperature is lower than the reaction condition temperature in the denitration chamber (12);
s3, dust removal: and (3) introducing the mixed gas subjected to desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and finish the desulfurization, denitrification and purification operations of the waste gas.
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